XILINX FPGA中,如果某一条路径被以下四个约束语句同时约束,那么哪几条语句是最终被工具采用作为布局布线的参考? (不定向选择题,答案可能是一个,也可能是多个)
A PERIOD constraint of 5 ns
B FROM TO constraint of 3 ns with a PRIORITY of 1000
C FROM TO constraint of 10 ns with a PRIORITY of 1
D FROM THRU TO constraint of 7 ns with a PRIORITY of 100
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